fixed mem stat tracking...now properly tracks memory footprint with floating point
precision
cleaned up macros for unit declaration
renamed units to SI standard for 1024 multiples (kibibytes, etc)
fixed units output for scene monitor dump

added labels to LLUnit types
added memstat dumps to llscenemonitor

removed unnecessary templates from accumulator types...now always
track data in double precision floating point, using templated accessors to
convert to and from arbitrary types

made recordings auto-update when executing query while active

fixed multithreading lltrace causing values to be interpolated towards 0
added Radians unit
improved sceneloadmonitor restart heuristic to use accumulated camera motion

revert changes for SH-3927: Interesting: Viewer should send predicted camera position to simulator to control object load order

reverted SlaveThreadRecorder update gating
moved processTimes() outside of Recording, so it is called only once per frame
refined sample merge logic so that multi-threaded samples do not stomp on linear history
of a stat

Automated merge with bundle:c:\code\viewer-interesting+c:\users\richard\appdata\local\temp\thg.sszl0v\ssh__richard@hg.lindenlab.com_richard_viewer-interesting_kkjl59.hg

fixed LLTrace::ExtendablePeriodicRecording::extend() to include *all* frame extensions
gated SlaveThreadRecorder pushing to master based on master update rate
reverted changes to LLThreadLocalSingletonPointer to not use offset-from-default trick

made LLCopyOnWritePointer enforce write access through write() again
disabled some error checking on release for download builds

fixed copy construction behavior of Recordings to not zero out data
split measurement into event and sample, with sample representing
a continuous function

Introduce LLCoros::setStackSize(), with a compile-time default value we hope
we never have to use. Make LLAppViewer call it with the value of the new
settings variable CoroutineStackSize as soon as we've read settings files.
(While we're at it, notify interested parties that we've read settings files.)
Give CoroutineStackSize a default value four times the previous default stack
size. Make LLCoros::launch() pass the saved stack size to each new coroutine
instance.
Re-enable lleventcoro integration test. Use LLSDMap() construct rather than
LLSD::insert(), which used to return the modified object but is now void.

clean up of llscenemonitor.cpp